Features of exciton transport in J-aggregates of amphi-PIC

• Дата: 2005
• Автори: Malyukin, Yu.V., Sorokin, A.V., Lebedenko, A.N., Efimova, S.L., Guralchuk, G.Ya.
• Формат: Стаття
• Мова: English
• Опубліковано: НТК «Інститут монокристалів» НАН України 2005
• Назва видання: Functional Materials
• Онлайн доступ: http://dspace.nbuv.gov.ua/handle/123456789/140068
• Назва журналу: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Цитувати: Features of exciton transport in —-aggregates of amphi-PIC / Yu.V. Malyukin, A.V. Sorokin, A.N. Lebedenko, S.L. Efimova, G.Ya. Guralchuk // Functional Materials. — 2005. — Т. 12, № 1. — С. 64-68. — Бібліогр.: 19 назв. — англ.

The experimental results concerning the efficiency of exciton migration under the exciton selective excitation within the amphi-PIC -J-aggregate absorption band at different temperatures are presented. To detect the exciton migration, the luminescence of exciton traps, which are molecules capable of energy capturing as an exciton approaches has been used. Exciton states have been shown to exhibit different mobility within the -J-aggregate absorption band. Excitons in the J-band absorption maximum provide an effective energy transfer to the trap. The efficiency does not change within 20-70 К temperature range and decreases monotonously in the 70-300 К one. At the longer-wavelength edge of the absorption -J-band, excitons are strongly localized. In the 70-300 К range, energy transfer to traps reveals a complicated temperature dependence and activation character.